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    <title>ShellCheck: SC2297 – Double quotes must be outside `${}`: `${"invalid"}` vs `"${valid}"`.</title>
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    <h1>SC2297 – ShellCheck Wiki</h1>
    <a href="https://github.com/koalaman/shellcheck/wiki/SC2297">See this page on GitHub</a>
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    <h2 id="double-quotes-must-be-outside--invalid-vs-valid">Double quotes
must be outside <code>${}</code>: <code>${"invalid"}</code> vs
<code>"${valid}"</code>.</h2>
<h3 id="problematic-code">Problematic code:</h3>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="SC2297.html#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="va">${</span><span class="er">&quot;USER&quot;</span><span class="va">}</span></span></code></pre></div>
<h3 id="correct-code">Correct code:</h3>
<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="SC2297.html#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;</span><span class="va">${USER}</span><span class="st">&quot;</span></span></code></pre></div>
<h3 id="rationale">Rationale:</h3>
<p>ShellCheck found a parameter expansion containing what appears to be
a quoted variable name.</p>
<p>While the parameter expansion itself must be quoted, as in
<code>"${valid}"</code>, the quotes may not appear inside the
<code>{}</code> as in <code>${"invalid"}</code>.</p>
<p>Also note that translated strings like <code>$"Hello"</code> may not
use curly braces.</p>
<h3 id="exceptions">Exceptions:</h3>
<p>None</p>
<h3 id="related-resources">Related resources:</h3>
<ul>
<li>Help by adding links to BashFAQ, StackOverflow, man pages, POSIX,
etc!</li>
</ul>
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    <p style='font-size: 80%'><a href="../index.html">ShellCheck</a> is a static analysis tool for shell scripts. This page is part of its documentation.</p>
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